第39卷第5期 2020年5月
分析测试学报
FENXI CESHI XUEBAO(Journal of Instrumental Analysis)
Vol. 39 No. 5无人机控制系统
590-596
d o i: 10. 3969/j. issn. 1004 -4957. 2020. 05. 005羟基吡啶功能化螺吡喃探针检测 霍志铭,何汶懿,王婕,夏凌,肖小华*,李攻科*松梢斑螟
(中山大学化学学院,广东广州510275)
摘要:柠檬酸是多种疾病潜在的生物标记物,因此发展对柠檬酸灵敏、专一的快速检测方法势在必行。该
文设计合成了一种羟基吡啶功能化水溶性螺吡喃探针,通过在螺吡喃骨架上引入羟基吡啶基团,利用螺吡喃
螺碳及羟基的协同作用增强了探针对柠檬酸的结合能力。结果表明,该探针对柠檬酸有选择性响应,并伴随
着明显的颜变化及荧光猝灭。据此建立了尿样中柠檬酸的荧光检测方法,方法线性范围为20-120^n〇l/
L,检出限为1.0|x m〇l/L。人工尿液中柠檬酸的回收率为85.7%~92.2%,相对标准偏差为3.0%~9.2%。该
方法具有操作简便、准确及选择性好的优点,在尿样柠檬酸检测中具有良好的应用潜力。
关键词:水溶性螺吡喃;羟基吡啶功能化;柠檬酸;尿液;荧光光谱
中图分类号:O657.3 文献标识码: A 文章编号:1004 -4957(2020)05-0590 -07
D etection of C itric A c id in U rine U sin g a H yd roxyp yridin e
Fu n ction alized Sp irop yran Probe工业盐水
HUO Zhi-ming,HE Wen-yi,WANG Jie,XIA Ling,XIAO Xiao-hua*,LI Gong-ke*
(School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China)
Abstract:To develop a rapid and highly selective method for detection of citric acid is ric acid is an important marker for a variety of diseases.A water-soluble hydroxypyridine functional
ized spiropyran probe was designed and synthesized by introducing hydroxypyridine group into spiropy
塑料提手
ran skeleton,as t o improve its binding ability to citric acid through the synergy effect between spiro
pyran-carbon and hydroxyl group.Results showed that the probe responded to citric acid with high
selectivity,accompanying with significant color change and fluorescence quenching.Based on this,
a rapid and sensitive fluorescence m ethod for detection of citric acid was established.The probe was
applied in the d etection of citric acid in urine sample,with a linear range of20-120pmol/L and a
detection limit of 10 pmol/L.Moreover,the probe was used for the detection of citric acid in
2.5%artificial urine.The recoveries ranged from 85. 7%to 92. 2% ,with relation standard devia
tions of3.0%-9. 2% .The method is facile,accurate and selective,and is potential in mination of citric acid in urine.
Key words:water-soluble spiropyran;hydroxypyridine functionalized;citric acid;urine;fluores
cence spectra
柠檬酸是一种重要的有机酸,对大部分需氧细胞而言,柠檬酸是柠檬酸循环(Krebs循环)中的重
要代谢物[1]。Gikedegadard等[2]的研究表明,恶性前列腺癌组织中柠檬酸含量较良性组织低,柠檬酸
可作为前列腺癌的生物标志物(Biomaker)之一,其在组织中的浓度可用于评估前列腺癌的等级。尿液
中的柠檬酸含量可用来鉴别诊断肾结石[]和肾小管酸中毒,在骨骼疾病诊断中也发挥着重要作用[4]。
智能开关方案柠檬酸的分析方法主要有气相谱(GC)法[5]、高效液相谱(HPLC)法[6]、毛细管电泳法[7]和稳定同
位素比值法[]等。但这些方法存在耗时、操作复杂和仪器设备昂贵[]等不足,发展新型、快速、准确、
收稿日期:2020 -01 -08;修回日期:2020 -02-15
基金项目:国家自然科学基金项目(21976213 , 21675178 , 21675179 , 21874159 , 21804147);广东省自然科学基金项目(2018A030313241);广东 省重点领域研发计划项目(2019B020211001);国家重点研发计划课题(2019YFCl6〇6101)
*通讯作者:李攻科,博士,教授,研究方向:谱/光谱分析、样品前处理,E-m ail: *********************
www.dd13肖小华,博士,副教授,研究方向:谱分析、样品前处理,E-m ail: ***********************